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Consolidated Statements of Condition (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
ASSETS:    
Held-to-maturity securities, at amortized cost fair value $ 189,622 $ 181,491
Voting Common Stock [Member]    
Shareholders' equity:    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 25,000,000 25,000,000
Common stock, shares issued (in shares) 4,651,829 4,651,829
Common stock, shares outstanding (in shares) 4,651,829 4,651,829
Non-Voting Common Stock [Member]    
Shareholders' equity:    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 1,505,283 1,505,283
Common stock, shares issued (in shares) 1,380,283 1,380,283
Common stock, shares outstanding (in shares) 1,380,283 1,380,283